反应 #1498151

反应方程式

(R)-1-phenyl-ethylamine

3-oxo-butyric acid methyl ester

Propynoic acid methyl ester

→

title compound

收率 73.9%

(R)-4-[1-(1-Phenyl-ethylamino)-ethylidene]-pent-2-enedioic acid dimethyl ester

收率 73.9%

溶剂

MeOH

反应条件

后处理

1. 1
   温度was refluxed for 3 h
2. 2
   温度the resulting mixture was refluxed for 2 days
3. 3
   其他the solvent was evaporated
4. 4
   其他the crude oil was recrystallized from MeOH

实验过程

A mixture of (R)-1-phenyl-ethylamine (3 g, 24.8 mmol) and 3-oxo-butyric acid methyl ester (3.2 mL, 29.7 mmol) in MeOH (100 mL) was refluxed for 3 h. Propynoic acid methyl ester (3.3 mL, 37.1 mmol) was added, and the resulting mixture was refluxed for 2 days. After cooling to r.t., the solvent was evaporated, and the crude oil was recrystallized from MeOH to give 5.56 g of the title compound as a pale orange solid. MS: (+) m/z 304.31 (M+1).

来源